Problems QBars3D Raspberry

[Huskydrive]

Hello,
I'm using Boot2qt and a Raspberry using OpenGL ES2.
I want to draw a Bars3D Scene.
But here I have a problem. The Rasterview shows up. I can also edit the Theme and so on.
If I insert data via a model to the Bars3D. It Also change the Raster from my View.
But no bars are displayed. Also no Labels on the Axis are Displayed.

I am using the example Code. I didn't get any error or something like that.
Do you have any suggesstions?

Best regards,
Julian